An illustration of a variety of vegetables, such as tomatoes, cucumbers, and carrots, covered with lingering pesticide residue, symbolizing the concept of 'residual toxins'. The vegetables are shown with drops of toxic substances on the surface, emphasizing the need to thoroughly wash them before consumption. The style is colorful and vibrant, with exaggerated expressions on the vegetables to highlight the presence of toxins. The background could include a kitchen sink or a faucet to suggest the cleaning process. The focus is on the vegetables and the toxic residues to effectively convey the idea of residual toxins in food.